Leadbelchers, what counts as 'being stationary'?

Hi friends! First post here. I got referred by a member of your community on an issue we had yesterday on one of our games.

A single Leadbelcher (made so by shots) fired on turn 2, pivoted on turn 3, pivoted once more on turn 4 and then shot again. When I said that he hadn't still spent one entire turn 'stationary', he argued that pivoting is still considered as stationary.

My fellow Druchii generals and the friends at Warhammer.org.uk think that, while a 'free' move, not costing inches in movement, it is still considered moving. It's part of the movement phase. Even more so as Ogres count as monsters in that they don't have a 360° line of sight, they have a flank, etc. Some compared it to using a fast cavalry to reform and then shoot without the -1 penalization for moving!. Others claim that being 'free' it excludes it from being movement at all.

I wanted to have your take on this issue? Thanks a lot for any insight,
Rafa.